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Benign fibrous histiocytoma of the renal capsule

S Kobayashi1, I Yamadori, M Ohmori

  • 1Department of Pathology, Kagawa Medical School, Japan.

Acta Pathologica Japonica
|March 1, 1992
PubMed

Insights

This report details the first case of benign fibrous histiocytoma originating in the renal capsule. Histological analysis revealed a distinct storiform pattern, differing from cutaneous forms.

Area of Science:

  • Nephrology
  • Oncology
  • Pathology

Background:

  • Benign fibrous histiocytoma (BFH) is a rare soft tissue tumor.
  • Renal capsule tumors are uncommon, with limited reported cases of BFH.

Observation:

  • A 44-year-old male presented with a tumor originating from the renal capsule.
  • Histological examination showed intersecting fascicles of fibroblastic cells in a storiform pattern.
  • Electron microscopy revealed intermediate filaments and membrane-bound collagen fibers.

Findings:

  • The renal capsular BFH exhibited a prominent storiform pattern.
  • Fewer secondary elements, such as xanthoma cells, were noted compared to cutaneous BFH.
  • The tumor's deep-seated nature may influence its histological presentation.

Implications:

  • This case expands the known anatomical locations for benign fibrous histiocytoma.
  • Understanding the histological variations between renal capsular and cutaneous BFH is crucial for diagnosis.
  • Further research may clarify the specific behavior and origin of renal capsular tumors.

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